"We just need another 6 months of development time..." - Every engineer ever.

@waynegilbert9504

3 жыл бұрын

And quite often they are proved right...

@paoloviti6156

3 жыл бұрын

@@waynegilbert9504 it depends very much if they have not encountered development issues. More importantly that the engine is born "right" as was the case of the Merlin that despite usual problems had only very few "teething problems" that was quickly solved, something that cannot be said regarding the formidable Napier Sabre IV engine; that had been principally delayed by protracted problems and slippages encountered in the development of this engine...

@jeff119990

3 жыл бұрын

"3 months maybe, 6 months definitely."

@waynegilbert9504

3 жыл бұрын

@@jeff119990 I have said that more than once.. :-)

@waynegilbert9504

3 жыл бұрын

@@paoloviti6156 My experience with development issues is that if they don’t turn up during development they appear during deployment and cost 50 times more to fix. The Merlin is a vastly simpler engine than the Napier Sabre, development of which was started with a very incomplete understanding of the sleeve valve technology - as illustrated in the case of the RR Crecy design. Of course, all of these died quickly when the gas turbine became a feasible reality.

Sometimes I cry a little when I watch these videos. Paul is like a really fatherly uncle. His understanding and passion of the subject matter is so clear and he is a blessing to the world.

I'm always amazed at the apparent genius of the forgotten engineers who designed the engines for automobiles and air planes in the first half of this century. Harry Ricardo was one those engineers who helped develop both the engine and the air frames of some famous aircraft.

@mann_idonotreadreplies

Жыл бұрын

Cool story bro.

The draughtsmanship in these engine designs is exquisite.

@joergmaass

3 жыл бұрын

Yes, I imagine they liked a good draught after work...

@PronatorTendon

3 жыл бұрын

My consistent consumption of British content allowed me to internally pronounce that properly the first time I read it

@2KOOLURATOOLGaming

3 жыл бұрын

@@PronatorTendon hahahahhhaa

@agauld3212

3 жыл бұрын

And here I am in 2021 getting sketches on post it notes to fabricate hydro Station parts...

@Shaker626

3 жыл бұрын

@@agauld3212 This is why engineers gotta put the foot down to upper management

An unsilenced merlin at full chat is only marginally less loud than this shirt. ❤️

@cornbreadfedkirkpatrick9647

3 жыл бұрын

What?

@remko1238

3 жыл бұрын

YESSSS it is

@davidelliott5843

3 жыл бұрын

Merlins always had ejector exhaust stubs. No nanny panby silencers for them.

@Ghost812many

3 жыл бұрын

You think it's that loud turn ya Belltone down Gramps! That shirt be pimpin! Also, awesome it would be to have an OG Rolls Phantom with one of those engines stuffed under the bonnet!

@pmcmanus420

3 жыл бұрын

Well played, sir. Well played, indeed.

I didn’t want this video to ever end. This was brilliant! Just like every one of your videos! Thanks mate.

@CuriousDroid

3 жыл бұрын

Glad you enjoyed it!

@autodidact537

3 жыл бұрын

@@CuriousDroid The RR Merlin engine had 4 valves per cylinder.

@steveperreira5850

3 жыл бұрын

Yes, indeed, a wonderful and informative video. I didn’t know anything about these sleeve engines, but now I know a little bit and it is fascinating. A very complicated engine though. I don’t think this kind of engine is practical for combat situation. We see that the best and most survivable aircraft of the war were actually radial engine air cooled, a much simpler design far less likely to fail due to combat damage. In the European theater which is about the only theater The English care much about, it was the P 47 thunderbolt that had the most aces because it brought those pilots back when they were hit by enemy attacks. It was much more likely to bring back the pilots. Spitfires and mustangs were superb aircraft, but a lot more of their pilots died young or became prisoners of war because the liquid cooled engines couldn’t take combat damage. Everybody knows this story.

@nicodetoffol6945

3 жыл бұрын

@@CuriousDroid thank you so much for this video. I red the book of the RR crecy. I think the crecy didn't secced also because the wrong decision of the british government to push for gasoline instead of diesel cycle. Ricardo tryed to prompt the diesel was better, (he actually invented this engine as diesel) but they do not heard him because they thoght it was a problem having two kind of fuel on the airfield, but hironicly when the jet engine was introduced thay had to take two fuels as well. Anyway it was to late and the jet was winning against the propeller at that time and the supersonic age was coming. More and less the same happened to Napier Nomad, another great english engine, in this case the lesson had been learned and it was a diesel, working on jet fuel also, unfortunately despite its good performances and low comsuption it was too complex. I hope you will post a wideo on Nomad and Deltic. Thank you very very much and forgive my english I am Italian.

@wildancrazy159

3 жыл бұрын

@@steveperreira5850 very unapriated comment. And so true, I hope others come back around and read it! Thanks...

I've never heard of the RR Crecy. Every day's a school day. Superb overview.

Modern fighter: "I will hide from AA with stealth." WWII fighter: "I WILL SCARE AWAY THE AA WITH THE SCREAM OF MY ENGINE!! BLOOD FOR THR BLOOD GOD!!"

@kiwibonsai2355

2 жыл бұрын

Lol awesome comment. 👌

If an engine survived, it would certainly have been made into a vehicle in Jay Lenos collection

@tlove2108

3 жыл бұрын

Your right! I could see Jay and his crew trying to recreate one TBH. Would be great content.

@bramcoteelectrical1088

3 жыл бұрын

its in my transit van

@seejaybee

2 жыл бұрын

And we would be able to hearing running in Bakersfield!

@billyfoster3223

2 жыл бұрын

Yeah, Jay sure is rich enough to do it!😁

@markthegunplumber8376

2 жыл бұрын

Rumor has it that Randy Grubb found one and is making a Motorhome around it that looks alot like an aircraft/duesenberg boat tail inspired vehicle like everything else he builds and yes Jay Leno has first dibs on it.

Small correction: The Stuka was the Ju-87. The Ju-88 was a twin-engine conventional bomber.

@F4Wildcat

3 жыл бұрын

And luftwaffe pilots and ground personell named it the "Dreifinger"

@givenfirstnamefamilyfirstn3935

3 жыл бұрын

Small? as bad as Do-87.

@Ibikyo1

3 жыл бұрын

Just a sidenote, the Ju-88 was capable of divebombing. However, I agree that he was very likely talking about the Ju-87.

@paoloviti6156

3 жыл бұрын

@@Ibikyo1 correct but the Ju 88 was not capable of dive bombing as the Ju 87 as it was too stressful for the wings so it was stressed for a 45° diving angle...

@anthonyxuereb792

3 жыл бұрын

Good pick up

The sound of a Merlin at full song is goosebumps inducing.

@bendeleted9155

3 жыл бұрын

Imagine the sound of a 12V92TT coming from a P-51. It would have been astounding.

@dogwalker666

3 жыл бұрын

Nothing can beat the sound of a or multiple supercharged Merlins.

@-CLUMSYDIYer-

3 жыл бұрын

When i hear a merlin starts up they give me goosebumps!

@dogwalker666

3 жыл бұрын

@@-CLUMSYDIYer- agreed cannot wait for the airshows to restart.

@-CLUMSYDIYer-

3 жыл бұрын

@@dogwalker666 to be fair i haven't been to one in years. Such a shame i do miss them!

Paul's Curious Droid channel reminds me of when the History channel on TV used to be good and you would actually learn about history with their great content, plus they never had someone with the eye blasting shirts as paul does either.

@SF-li9kh

3 жыл бұрын

Until they embraced "Ancient Aliens"

You have no idea how happy this video makes me! There has been so little information on the crecy on the interenet, and finally someone decides to compile all of it to a compact, yet very informative video. Thank you so much Paul!

As someone who works as a designer/drafter, I'm very impressed with the hand sketched isometric drawings of these old engines. Super detailed and complex.

An aircraft engine more powerful than the Griffon? That's just Crecy.

@garrygong4400

3 жыл бұрын

ba-dum-tss

@Neb_Raska

3 жыл бұрын

Get out

@garrygong4400

3 жыл бұрын

@@Neb_Raska :(

@jimdavis8391

3 жыл бұрын

No....Mad.

@sadiqmohamed681

3 жыл бұрын

Napier Nomad.

The Crecy was also overwhelmed by the contemporary development of the turboprop, which is lighter and far less mechanically complex than a piston engine.

@malcolmstreet1

2 жыл бұрын

That was my first thought in the section about the power recovery turbine for civil use - it was squeezed out by jets for the military and turboprops for airliners.

Correction.... Merlin had 4 valves per cylinder, some of the later engines had sodium cooled exhaust valves...

@dbmail545

3 жыл бұрын

Indeed. Modern F1 engine practice uses multiple poppet valves and extremely "oversquare" bore to stroke ratios to get about 2HP/c.i.

@RidinDirtyRollinBurnouts

3 жыл бұрын

The Ford GAA was an all aluminum DOHC motor with 4 valves per cylinder. Ford wouldn't make another motor with this technology until 1992

@waynec3563

3 жыл бұрын

I believe they all did - the sodium filled exhaust valve was developed in the US in the late 1920s/early 1930s. Also, the Griffon was not a Merlin derivative.

@cadmcspeed1418

3 жыл бұрын

@@dbmail545 as a modern f1 engine has less than 100 cubic inches in displacement and its horsepower is about 800. It has nearly 10hp/ ci

@mgutkowski

3 жыл бұрын

Came here to say the same. It's also a single overhead cam with angled rocker arms to manage the multiple valves.

Excellent video Paul. Harry Riccardo is unsung hero. I never knew about the Crecy engines, sleeve valves etc. Absolutely brilliant

@CuriousDroid

3 жыл бұрын

Glad you enjoyed it

What I wouldn't give for a Q&A session with those engineers. Simply amazing.

thanks for this video, will be spending the rest of the day trying to find out more about it

Excellent. Just as I’m reading a book on the Merlin, Griffin and related engines. Which leads me to wishing for a video on Whittle and the development of the jet engine.

@WillArtie

3 жыл бұрын

Yes please!!!

@dave_h_8742

3 жыл бұрын

Highly underrated guy, forgotten by a lot of people. (Americans, we invented the spark plug, jet engine, pivoting tail canard on X1, aircraft carrier etc... Err no you didn't )

@martinda7446

3 жыл бұрын

@@dave_h_8742 The Germans might argue with you...

@wolverine8658

3 жыл бұрын

And don't forget Hans Joachim Pabst von Ohain

@stephengloor8451

3 жыл бұрын

“JET - Frank Whittle and the Development of the Jet Engine” by John Golley isbn 978-1-907472-00-8 is a good one. Also “Not Much of an Engineer” by Sir Stanley Hooker goes into Whittle a lot as Rolls Royce, lead by Stanley Hooker, took over the jet engine work of Whittle. A lot of that is in the book.

I'd love to see a modern sleeve valve 2 stroke.

@dbmail545

3 жыл бұрын

I'd love to hear one(with ear pro, of course. My hearing is permanently damaged from racing unmuffled 2-stroke motorcycles)

@SF-li9kh

3 жыл бұрын

Pollution. 2 stroke is HIGHLY polluting due to incomplete combustion. Even 4 stroke V12s are being phased out soon.

@murmaider2

3 жыл бұрын

@@SF-li9kh this doesn't burn oil.

@ta22stcoupe

3 жыл бұрын

@@SF-li9kh You're speaking of standard moped and lawnmower motors whose major contribution to pollution isn't the incomplete combustion (there are ways to improve that btw) rather it's the necessity to add oil to the fuel/air mixture. Those 2 strokes use the pistons movement to suck in fuel/oil/air mixture into the crankcase and up to the inlet ports, which means you cannot suck up oil, pressurize it and guide it through crank bearings like a 4 stroke. So adding oil to the mix is how this problem is usually tackled, but of course the downside is, you don't want oil in your fuel air mixture but that's just where it has to end up, and get burned and expelled through the exhaust all the same. This causes a significant odor and a blue-ish smoke and is not environmentally friendly at all. The sleeve valve doesn't seem to have the same issues. Mixture gets forced in same way as in a 4 stroke, and out similarly by the pressures induced by the moving piston and the ports in the sleeve allowing the pass through. So here it's not needed to add oil to the fuel/air mixture. But it does raise an interesting question. How is the oil film between the sleeve and the cylinder lining as well as the film between piston and sleeves accomplished? I'm guessing a separate oil pump?

@sheep1ewe

3 жыл бұрын

@@ta22stcoupe I don't know if links are available here, but on the wiki page there is a cout throu picture of a real engine wich has what at least to me looks like it could be external oil rims in the cylinder walls on two points of the outher passage.

This was amazing! Never heard of the Crecy. Thank you for your time and efforts on this!

You are the best source of information. I love your videos, they are great quality documentaries that you narrate very nicelly!!

@PeterPaoliello

3 жыл бұрын

I'm shocked he hasn't broken through million subs, I was expecting to see at last 4M up there, honestly one of my faves.

Always loved the old 2 stroke Detroit diesels. So loud. Converting diesel and air into noise and smoke.

@rbagel55

3 жыл бұрын

Peter Wright Me too. I drove many Detroit powered trucks. I can only imagine what a RR Crecy would sound like at full RPM

@jacobpoucher

2 жыл бұрын

2 stroke dd are not sleeve valve....you guys sound like tyler at indiana diesel, he is a dum dum

Very enjoyable - never heard of this engine, so now I have some reading to do!

Completely mind blowing. Good topic, good story telling, good footage, good editing, all together a high quality video.

Great video Paul. I'd never heard of the Crecy; what an amazing engine! Thanks for bringing it to my attention.

Damn, this thing was EXTREMLY powerfull

FINNALY SOMEONE KNOWS ABOUT THE CRECY

Thank you for all these amazing videos!

Most informative thing I have ever found on the Crecy. Thank you for this. Based on the written descriptions of its sound, I took to calling the Screechy. It would have been shattering.

Sleeve valves also don't have valve springs, so no valve float at high rpm.

@dave_h_8742

3 жыл бұрын

Called it bounce in my day and adding another inside the bigger one sorted it out.

@ChefofWar33

3 жыл бұрын

True. But the also have more rotating mass so reaching those high rpms would be nearly impossible.

@Buzdu22

3 жыл бұрын

That problem was solved in F1 with pneumatic springs. Sleeve valve engines have a lot of friction, both from the sleeves and the gearing that drives them.

@pleasedontwatchthese9593

3 жыл бұрын

There have also been gear driven values. It's not competitive today due to more mass and higher service intervals (modern springs are more reliable because everyone uses them and so much r&d has been done)

@autodidact537

3 жыл бұрын

Sleeve valve engines are also real oil burners.

Look up the Napier Nomad to see where that sort of thinking ultimately led.

@sadiqmohamed681

3 жыл бұрын

2-stroke diesel, with a huge turbocharger that could produce useable thrust. The test engine were reliable getting over 3500hp at a ridiculously meagre fuel consuption. Then the added an intercooler, and then stuck an afterburner on the back of the turbo! Madness, but it got the power to weight down to 0.83lb/hp. And the test horsepower was around 4100. There is a great write up in LJK Setrights book "The Power to Fly", a history of the piston engines used in aircraft.

@donaldasayers

3 жыл бұрын

@@sadiqmohamed681 I found it in "Some Unusual Engines" by Setright.

@sadiqmohamed681

3 жыл бұрын

@@donaldasayers Another good book. I should look for a copy. I haven't read it for a very long time. I used to have "The Power to Fly", but it disappeared a couple of decades ago. I spent more than 10 years looking online before I found one I could afford. Good copies are into hundreds, and there was a mint edition fo £1,400! All Setrights books are collectible.

@robertnicholson7733

3 жыл бұрын

@@sadiqmohamed681 Technically, it would be better to describe it as a gas turbine that used a 2 stroke diesel as a gas convertor. If you follow Chatterton's work you will see why. It was just too complicated, two engines in one, required a spark ignition to get it started, but the real problem was the delicate Biers variable ratio coupling. Had some unusual internals, since it was a two stroke, the con-rod little end was a slipper bearing, the con-rod big end bearing shared the same journal, there was no big end cap just a couple of small rings to top stop the rods from falling off the journals when the engine was at rest or starting. Pressurized coil cooled piston crowns of martensite (AFAICR), the list of design features goes on. the Nomad 1 was far more complex than the Nomad II, however complex does not mean advanced.

In 1916, the RAF R.E.8. flew with a 13 liter V-12 turning out 150 horsepower. A couple of decades later and THIS was in the draft.

Keep the videos coming!! So brilliantly presented

The comet cilinder head looks very similar to the pre ignition chamber used in F1 engines

@CuriousDroid

3 жыл бұрын

Yes that was Ricardo's invention and its used on high speed diesel engines and others

The Napier Sabre engines on a test stands were clocked at 5500 hp at a capacity of 36.65 litres. That's also pretty impressive!

@sergarlantyrell7847

3 жыл бұрын

And a less powerful version was put into a Hawker Fury prototype (that would eventually become the Bristol Centaurus-powered Sea Fury) to produce one of, if not the fastest piston-engined combat aircraft ever.

@thethirdman225

3 жыл бұрын

That came up in Setright’s “The Power to Fly” but it’s actually not true. I can’t even find out where he got it from because he didn’t get it from Napier. Both Calum Douglas and the late Bill Gunston poured cold water on the claim, Gunston with mathematical formulae and Douglas with a mechanical explanation. Douglas says that the Sabre’s sleeve valve made it less open to development than a conventional poppet valve engine. The reason is the pressure exerted on the sleeve, making it expand in an already close-fitting block. Sleeve valves had plenty of advantages, including but not limited to lower noise and high installed base power. What it didn’t do well was boost, which was the best way to achieve higher torque at the time. AFAIK, the highest power achieved by a Sabre in service was about 3,200, though 3,500 has been claimed.

@kiwihame

3 жыл бұрын

@@thethirdman225 Douglas book is the shizzle.

@thethirdman225

3 жыл бұрын

@@kiwihame Have you read it, you lucky dog? It sounds like the bomb. I haven’t got it yet but he’s in a couple of excellent KZread presentations. It’s on the list but it’s rather pricey! Still, I suppose you get what you pay for...

@joejoejoejoejoejoe4391

3 жыл бұрын

If you chopped of the massive supercharger and replaced it with turbos, could a sabre by squeezed into a spitfire ?

Paul, I love your channel as a whole, but my tastebuds are royally tickled when it comes to your aviation videos, especially the WWII stuff. Bloomin’ marvellous! Thanks for what you do.🙂👍🏻

Some great videos mate. Never seen a sleeve valve engine breakdown before. Fascinating!

Another terrific subject, about which I knew relatively little. But the quest for very high power to weight ratios, the seeking for alternatives to the traditional poppet valve system, two stroke engineering, and not last the modular approach to engines, leads to the Napier Deltic. And I hope that you'd consider looking Into this remarkable machine. The same company that made the actually operational high-performance sleeve valved engine you mentioned, the Sabre, made this engine, and I think that many of the advanced propulsion engineers who worked on the first project were involved in this machine. And the Sabre wasn't the only one to reach operational state (in the Typhoon and Tempest), but so did the Deltic, although post war in the Royal Navy's Motor Torpedo Boats. The difference was the continued viability of the piston engine over the gas turbine in marine installations gave it a life that aeroengineering did not. Another fascinating parallel is a late stage development of the Deltic was to act as the initial stage of a combined-cycle decoupled compressor for a gas turbine second stage, I think for English Electric. The late-war innovation in UK engineering is a hard thing to get your mind around, and much of it no longer exists in service. Not so the Deltic, which is still in use. I am not impartial: my dad was an engineer for Napier after the war; he worked as an engineer apprentice on the project to put the Deltic in the Royal Scot, and also worked too on Royal Navy ships that were Deltic equipped before being sent to Canada to represent Napier in its dying stages. Rolls gets the glory, and the Merlin was the mainstay of the war. But Napier's lost and forgotten history is complex, full of innovation, and in every way remarkable. It'd be nice to see some of that showcased by your consummate presentation and research skills. Most of all, the Deltics, with three crankshafts and no valves, were just the kind of things you oughta love, and like nothing else.

placing 8 of these engines vertically, and in a circle, would make for a pretty powerful disc shaped drone.

@joshuahadams

3 жыл бұрын

I think that crosses the line from drone to full-on helicopter.

@TheTrumanZoo

3 жыл бұрын

@@joshuahadams well two inverted helicopter blades on top and below could feed the downward airstream through the engines cooling them and feeding them air to work with for the rotors in between them.

@DMSrunit

3 жыл бұрын

That’s when weight and fuel storage come and slaps you

@TheTrumanZoo

3 жыл бұрын

@@DMSrunit or turn electric and use the entire hull for generation to f power.

@DMSrunit

3 жыл бұрын

@@TheTrumanZoo one you start converting your losing power to efficiency issues and heat. Cool concept thought

One of the few sites where the comments equal the videos or posts. A very enjoyable experience every time I watch one of these episodes.

Fascinating, I had never heard of this engine until now. I like the level of technical detail in the video, just the right amount to satisfy the gearheads without scaring off everyone else.

There were significant problems with sleeve valve engines, apart from the little you mention. No 1 is metallurgy to make the sleeves in a way that thermal expansion differences between cylinder/sleeve/piston are acceptable, second is horrific oil consumption, and from that plug fouling from the oil on the cylinders. There are also very high power losses from the friction between sleeves, cylinders and positions, quite apart from the drive gear. Weight is another issue. These issues delayed the sabre engines from going into production/service for more than half of WWII. There's a lot of info in Calum Douglas' book, The Secret Horsepower Race. This covers piston engine development on Both sides in WWII. Highly recommended for engine nerds.

@stringpicker5468

2 жыл бұрын

It did not delay the Bristol Hercules or Centaurus much, both sleeve valvers.

It is not a "rotary" engine it is a RADIAL engine.

@jamest.5001

3 жыл бұрын

Yeah, and what is called the rotary, Mazda engines, Wankel engine, is a rotor engine, something was lost in translation! The rotor engine, the crank was stationary and the crankcase rotated! Crazy design, must had been impossible to balance!

@joshiek7839

3 жыл бұрын

Rotary aircraft engines had a stationary crankshaft. The entire cylinder case rotated around it.

@ineednochannelyoutube5384

3 жыл бұрын

@@joshiek7839 Not rotary radial. Rotary is the wankel engine. And I suppose the one in the sopwith camel where the crankshaft was fixed to the fuselage, and the piston blocks rotated along with the propeller, if you want to be pedantic.

@joshiek7839

3 жыл бұрын

@@ineednochannelyoutube5384 it’s not being pedantic that’s what they were called. A Wankel engine is a Wankel engine. It’s only colloquialism that it became a rotary engine.

@ineednochannelyoutube5384

3 жыл бұрын

@@joshiek7839 A radial is not a rotary. Radials were not called rotaties.

I didn't even know that this magnificent engine existed! It's a shame that none of the prototypes still exist. Awesome video!

Fantastic video. Very informative. Thank you for the effort you put in to make this great content.

Very interesting new information to myself. Interesting to know what was in the pipeline but never made production. UK developed a second jet engine, an axial flow jet at the Metropolitan Vickers factory near Manchester. It flew in the Meteor in 1943. The Development prototype was known as the J1 and the J2 the version flown. It went on to become the saphire. Perhaps this story could be told and how it all came about.

Rotary? You mean radial! Rotary is something completely else. ;-)

@CuriousDroid

3 жыл бұрын

Yes, I meant radial, my bad

@alecbaldwinsnotpropgun

3 жыл бұрын

Long live wankel

@PrinceAlhorian

3 жыл бұрын

@@alecbaldwinsnotpropgun not Wankel rotary... Look up World War 1 rotary. The radial had the pistons stationary with the shaft turning. The rotary had the shaft fixed and the pistons spinning to aid cooling.

@alecbaldwinsnotpropgun

3 жыл бұрын

@@PrinceAlhorian got it thanks, but still long live wankel 🤪🤪🤪🤪

@samiraperi467

3 жыл бұрын

@@PrinceAlhorian Yeah, piston rotary engines were crazy shit.

Great video. I've read Ricardo's books and enjoyed them but it's great to see more pictures and descriptions of the Crecy.

It continues to amaze me how it can make an interesting youtube video, to tell the story of a little known and largely forgotten airplane engine. Keep it up!

Somewhere, I hope someone is tinkering with this idea for the fun of it.

@mrpicky1868

3 жыл бұрын

1 off engines with no interloopin parts at all with other designs is crazy expensive and it still will be a sprinter engine

@leroyjenkins4811

3 жыл бұрын

@@mrpicky1868 I don’t think anyone is trying to produce this engine, not even for nostalgia sake. Today’s jet engines are better than any piston engine will ever be. If a prop is needed, a turboprop engine (which is still nothing more than a jet engine turning a prop) is still better than any piston engine. Sorry, my man. Piston engines are still in use but not for high speed military or civilian applications.

@dieseltruck9638

3 жыл бұрын

@@leroyjenkins4811 well there’s heavily modified piston engines for air racing, like the voodoo mustang with a 3000hp griffon, they race them in the Reno air race, it hit 531mph fastest piston aircraft ever, so there are some out there would be cool to see this in that application

@omartorres5688

2 жыл бұрын

@@dieseltruck9638 Question just like they modify Mustangs do they also do that with P40's as well like putting Supercharged engines in them?

Imagine if the sleeve cylinder was brought back for car engines

@josephbargo5024

3 жыл бұрын

Some do, but mostly its done for aftermarket 1000hp engines.

@andrasbiro3007

3 жыл бұрын

Would have the same fate, internal combustion engines are done, they'll be gone in a decade, so it makes no sense spending any money improving them. They are being replaced by electric motors at an exponentially accelerating pace.

@dbmail545

3 жыл бұрын

Apparently the F1 engine development eclipsed the sleeve-port power levels by the 90's. I think complexity of manufacturing was the insurmountable problem, and extremely short stroke engines with multiple poppet valves were a cheaper solution.

@dbmail545

3 жыл бұрын

@@andrasbiro3007 there isn't enough cobalt and lithium to make every vehicle on the road today electric. Not even close. Just like piston aircraft are still being built, there will be a place for ICE's in the foreseeable future.

@josephbargo5024

3 жыл бұрын

Sleeving a block is more of a requirement when power eclipses a certain amount. Sleeving doesn't add power... F1 probably uses different alloys to not require sleeving and use much different designs. Most power gains are from forced induction.

Very well done video and super informative. Fascinating material. What a shame no sounds of the engine running or examples around today to thrill us. Many thanks.

A fascinating bit of engineering history I knew absolutely nothing about. Thank you!

Someone should put that engine in a modern propeller plane and fly it at an air show

@dphalanx7465

2 жыл бұрын

God if someone found one of the original test Crecys; that would be on a level of recovering the Ark of the Covenant, LOL.

Hilarious that the Brits named the engine "Crecy." That's a big "Up yours very much" to the French.

@remliqa

3 жыл бұрын

I don't get it. Can you please explain the context of the word?

@ATomRileyA

3 жыл бұрын

@@remliqa Comes from the Battle of Crecy where the British flattened the french even though they had twice the number of soldiers (British 10-16k, French 20-30k) and also suffered massive losses: British losses = 40-300 French Losses = At least 4,000 killed, including 1,542 nobles So quite cheeky to use that name :)

@tristacker

3 жыл бұрын

@@ATomRileyA strictly speaking it was the English versus France, as Britain was not formed until Scotland and England signed the act of union in 1707. Battle of Crecy was 1346.

@markhamstra1083

3 жыл бұрын

@@tristacker That would come as quite a surprise to Julius Caesar, who invaded “inland Britain” (Britannia pars interior) in 55 BC.

@tristacker

3 жыл бұрын

@@markhamstra1083 Britannia was the name the Romans gave the geographical island not the name of the people who inhabited it. Britain or Great Britain or the United Kingdom did not exist as a political entity until 1707. At the time of Crecy there was England with Wales as a province, and Scotland which were separate nations.

Great video, just amazing as always.

A very educational video. None of my aircraft books mention this engine at all.

Imagine what Mike Patey could build if he got his hands on one of these!

@JE-ti3cz

3 жыл бұрын

Some serious wizardry would take place

@jaredneaves7007

3 жыл бұрын

A Crecy.... but with nitrous!

@gonun69

3 жыл бұрын

The important question is, can he put it on a Wilga?

@tech4pros1

3 жыл бұрын

I'd tune it up as far at it would go (possibly run it on pure methanol) and put it in a p51 racer. Win the reno air race unlimited class hands down.

@craigwall9536

3 жыл бұрын

Another _single-seat blender,_ of course. I don't think his wife wants to ride anymore.

It would have been nice to know the hp/lb as well as the hp/in^3 performance relative to the other engines. That's much more important for an aero engine. Also I love the name "Crecy". The British used longbows there.

Astonishing video. Really enjoyed this. Thanks!

Your videos on Rolls-Royce products are always interesting. I would love to see one on RR helicopter engines such as the Gem

I'm a Yank and I know the Merlin engine. It powered the Hurricane, Lancaster bomber, the legendary Mosquito, and even the Supermarine Spitfires

@autodidact537

3 жыл бұрын

I guess you weren't listening that's what he said in the video.

@kieranh2005

3 жыл бұрын

The mustang, some later p40's and even some ME109 fighters after the war (Swiss and I believe Spanish) A detuned variant was used in tanks (RR Meteor)

@EthanBSide

3 жыл бұрын

@@kieranh2005 You're on it. The P-51 was arguably the best user of the Merlin (again I'm a Yank;)

If it had been perfected around 1941 then we could've possibly seen it in later model Spitfires and Mustangs.

@andrewfarrow4699

3 жыл бұрын

But they would have needed drop tanks just to cross the English Channel due to the Crecys enormous fuel consumption.

@AsbestosMuffins

3 жыл бұрын

doesn't seem like it would be useful even in 1941 since its fuel consumption was very bad according to what we know anyways, so it would only have been good for 1940 at best

Excellent video, very impressed with your commentary. Highly professional.

Mo powah babay!!! I'm loving these videos of engines thank you!

It's crazy how far we have come. They were aiming for 1hp per cubic inch as a gold standard. That's the equivalent of a 5 liter V8 making 300hp or a 2 liter I4 making 120hp.

@julianneale6128

3 жыл бұрын

This is where many go very wrong. An aircraft engine has to have many features including power to weight ratio. Hp per litre has nothing to do with it. Break horsepower per litre is important for other applications but not an aircraft engine.

@-DC-

3 жыл бұрын

@@julianneale6128 *Brake

@ColinMill1

3 жыл бұрын

In many ways we have not gone far at all. The BRM V16 designed in 1947 (with input from Rolls Royce) achieved over 600 hp from 1500cc or over 66hp per cu. Inch - very comparable to the output of the current F1 engines when their hybrid elements are removed from the equation. As has been said, aero engine requirements are entirely different to automotive needs.

@julianneale6128

3 жыл бұрын

@@-DC- haha thank you!

@mike-barber

3 жыл бұрын

Gotta remember that this is at 3k rpm, partly due to the size of the thing. A modern 5l v8 would be more like 6k rpm, so expect double the specific power output just based on the rpm difference. Considering this, and the materials of the day, it was a pretty lofty goal.

Oh look, a gift for my insomnia

@02markcal

3 жыл бұрын

Brett hope you are doing better and this gift from Curious Droid is not just a time wasting KZread, but one you will actually learn something from.

Fascinating and well presented. Thank you.

Many thanks for a most interesting talk, very informative & interesting, plus well and very clearly spoken! Again many thanks. Andy

The name let it down obviously.

There never was a Rolls-Royce 'Griffin'!. It was called Griffon, after a bird of prey (Griffon vulture) as all RR piston engines were...

@artnull13

3 жыл бұрын

I blame HP, probably thinking of the mythical creature

@mattjacomos2795

3 жыл бұрын

named after birds, turbine engines were named after rivers...

@johnmoruzzi7236

3 жыл бұрын

Yes and not "Griffen" as displayed incorrectly.. sloppy.

Man that sound is amazing!!! Merlin and radial engines sound sooo good

Love your videos, brother.

Would like to see a piece on the news Rolls Royce micro nuclear reactors :)

@waynegilbert9504

3 жыл бұрын

RR keep this very quiet as even the idea of nuclear power brings the greenies out in force. www.rolls-royce.com/innovation/small-modular-reactors.aspx#/

@phooogle

3 жыл бұрын

@@waynegilbert9504 I know and it's insane. Nuclear power is greener than grass !

@phooogle

3 жыл бұрын

@@waynegilbert9504 I love how it works on "junk"fuel as well that isn't weaponised.

How I wish some clever engineer would find that engine interesting enough to take on the task and try to recreate and perhaps, complete the design. Would be a proper salute to the original designers and the engine it self, to see it complete.

@waynegilbert9504

3 жыл бұрын

Using current manufacturing technology and materials, this would not be a particular problem. But it would be a solution to a problem the existed 80 years ago and would have little value today. Apart form making one hell of a noise :-)

@johnmurrell3175

3 жыл бұрын

@@waynegilbert9504 Go and see Riccardo Consultancy in Shoreham with a large wadge of cash and they will probably build you one.

@waynegilbert9504

3 жыл бұрын

@@johnmurrell3175 No doubt about it, hence my comment.

Thanks. One of your many best videos.

That cut-away illustration at 5'-58' is amazing, I created many illustrations over the years, but that one for it's time was a Gem !!. Thankyou poster.. I would like a copy of that.

Let’s build one

"... that made the Merlin look simple by comparison ..." - oh, lordy. There was nothing simple about the Merlin.

@craigwall9536

3 жыл бұрын

At the Pima Air Museum there is a Bristol radial sleeve valve engine cut away and set up to run electrically in slow motion so you can see everything and how it all works. It is _stunningly_ complicated. Trust me: no mechanic would EVER want to be responsible for _that_ piece of kit if a turbojet was an option...

I am impressed at how knowledgeable you are, Varys.

This is tremendously interesting and it's the first time I've run across this engine (and I'm a student of aircraft and aircraft engines!)! Thank you!

Hey Paul, what are your thoughts about the declassification by the pentagon of the UFO files?

@NathansHVAC

3 жыл бұрын

For 70 years, every photo and video is still filmed on a potato? Very sus

@MrEazyE357

3 жыл бұрын

@@NathansHVAC So, what about the ones filmed with very advanced equipment by highly trained fighter pilots? You know, the ones that moved in ways that no known earthly aircraft can move? Pretty sure that's what they're referring to.

@zogworth

3 жыл бұрын

It's weird how frequently that UFO releases are timed to coincide with the pentagon taking heat for something else. Such as Arms to certain middle Eastern countries

@carwashadamcooper1538

3 жыл бұрын

Distraction. Eyes on audits.

is this the engine that could've saved the Westland Whirlwind...

@dphalanx7465

2 жыл бұрын

No, way too big. The Whirlwind was built (very tightly) around the RR Peregrine (which was a step below a Merlin in size). Given that it was estimated that the Crecy was too much power for the Spitfire airframe, it's a guarantee that it would be too much for the Whirlwind. In fact, they did some estimates for the _Mosquito_ and thought the Crecy would be too much for that plane, of all things!

A video I never thought I'd ever see, epic!

This was VERY interesting, thank you... Great presentation 👍🏻

Almost as depressing as watching the demise of the TRS2. 😢

Upvote if you like the shirt!

First time I've ever heard of this,amazing

This WAS fascinating. Thank you.

It could be heard 5 miles away, mmm just like my wife

Good grief! I love this video! Very attention getting, full of technical information, and presented in such a way that I wish there were 50 more just like it! Someday I will learn to use fewer exclamation points, but I have to use them here. Good on ya mate.

Wonderful insight into a fascinating piece of engineering. Great video.

Outstanding......Thanks Paul...!

I absolutely loved this vid❤️! I genuinely learned something about an engine I hadn't heard of, and the detail and technical depth gave me an 'engingasm'! Sleeve valves.... Ooohhhhaahhh yeh baby!

Another outstanding video, thank you Fascinating

Love your videos! Keep it up :)

Thank you. Never heard of this design.